Drupal: module to implement credit system

Question

Hello.

I wonder, which Drupal modules I can use to implement the following system:

User has X amount of credits on his account (I think CCK can store this value). He can create specific Nodes (requests for admin). Each Node has a Type (Taxonomy defined, may be. Or via CCK). Each Type has associated number of credits. When user publishes a Node providing certain type, his balance of credits decreases by the number of credits Node Type has (admin will perform this request and send user notification email).

This is some kind of very simple e-shop for activation codes. I didn't want to use Ubercart due to it's complexity. May be this functionality can be achieved using some simple Drupal modules? Or may be there are some alternate ways? Or it is better to go Ubercart (can it do what I want BTW)?

Answer 1

I've seen folks in the Ubercart forums do this kind of thing for purchasing/posting ads on a site.

Check out these modules:

http://drupal.org/project/uc_store_credit

http://drupal.org/project/userpoints_ubercart